The purpose of the present work is the experimental investigation on the extinguishment of diesel container fires by a water-mist system with base injection through multiple nozzles placed symmetrically at various positions around the rim of the container. Experimental parameters selected are the orifice diameter of the nozzle, the number of nozzles, position of nozzles (angle of orientation, radial and vertical distance of the nozzle from the edge of the container), and injection pressure. Nozzles used in the present work are pressure-swirl nozzles with Z-type swirl-insert with solid-cone spray. Desirable properties of the system such as the non-clogging operation of the nozzle and uniform mass flux density in the spray are tested for the nozzles. The optimized solution is provided considering water consumption and the physical stability of the fuel surface in the container. Displacement of oxygen is observed as a predominant extinction mechanism due to the effective application of spray in the base region of the fire. The present work provides the parametric study of the extinction establishing the feasibility of the water mist system with a base injection for extinguishing tank fires. This may serve as guidelines for the preliminary design of the system with the extension for larger tank fires.

本工作的目的是通过水雾系统扑灭柴油集装箱火灾的实验研究，该系统通过多个对称设置在围绕容器边缘的不同位置的喷嘴进行基础喷射来进行。选择的实验参数是喷嘴的孔直径，喷嘴的数量，喷嘴的位置（方向角，喷嘴与容器边缘的径向和垂直距离）以及注射压力。当前工作中使用的喷嘴是带有Z的压力旋流喷嘴型旋入式固体锥形喷雾器。对喷嘴测试系统的理想特性，例如喷嘴的无堵塞操作和喷雾中均匀的质量流量密度。考虑到水消耗和容器中燃料表面的物理稳定性，提供了优化的解决方案。观察到氧气的置换是主要的灭绝机理，这是由于在火的底部区域有效地喷洒了喷雾。本工作提供了灭绝的参数研究，建立了带有基础喷射器的水雾系统灭火罐灭火的可行性。这可以作为系统初步设计的指导，并带有针对大型油罐起火的扩展名。